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10 Cards in this Set
- Front
- Back
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Potential Difference
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The potential difference between two points in a circuit is the energy lost by one coulomb as it moves from one point to the other.
V=W/Q |
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Unit of potential difference
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the volt or joule per coulomb
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Potential Difference 2
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It is the amount of energy converted from electrical to other forms between the two points when 1 coulomb of charge passes any point of that circuit
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alternate formula
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P=VI
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Voltages in series
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The potential difference across two or more consecutive parts of a series cir hit is equal to the sum of the potential differences across each part
V=V1+ V2+ V3 |
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Voltages in parallel
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the potential difference across each of a number of conductors connected in parallel with each other is the same
i.e. V1=V2=V3 |
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Voltmeter
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A voltmeter is always connected in parallel with the part of the circuit across which the p.d is to be measured
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Electromotive Force
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A volage when applied to a current is called an emf.
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Sources of EMF
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electric cells, simple cell= beaker sulfuric acid and a zinc and copper plate, primary cell cannot be recharged and often called dry cell, secondary cell can be recharged, thermocouple, the mains
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Batteries Connected in Series
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The total voltage is equal to the sum of the individual voltages
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